Вам с клиентом нужно решать. Там проблема. Может роуты какие добавляет после установки.
netstat -rn
Покажите после установки соединения с клиента
C:\>netstat -rn
===========================================================================
Interface List
18...54 e1 ad 08 d2 bf ......Realtek PCIe GBE Family Controller
61...........................Home-VPN
12...3e 95 09 53 0c 07 ......Microsoft Wi-Fi Direct Virtual Adapter
22...4e 95 09 53 0c 07 ......Microsoft Wi-Fi Direct Virtual Adapter #2
3...00 ff 13 20 5d 5b ......TAP-Windows Adapter V9
9...3c 95 09 53 0c 07 ......Qualcomm Atheros QCA9377 Wireless Network Adapter
20...3c 95 09 53 0c 08 ......Bluetooth Device (Personal Area Network) #2
1...........................Software Loopback Interface 1
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.88.1 192.168.88.100 25
my.home.public.ip 255.255.255.255 192.168.88.1 192.168.88.100 26
127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
127.255.255.255 255.255.255.255 On-link 127.0.0.1 331
192.168.88.0 255.255.255.0 On-link 192.168.88.100 281
192.168.88.100 255.255.255.255 On-link 192.168.88.100 281
192.168.88.255 255.255.255.255 On-link 192.168.88.100 281
192.168.111.0 255.255.255.0 192.168.111.129 192.168.111.140 26
192.168.111.140 255.255.255.255 On-link 192.168.111.140 281
224.0.0.0 240.0.0.0 On-link 127.0.0.1 331
224.0.0.0 240.0.0.0 On-link 192.168.88.100 281
224.0.0.0 240.0.0.0 On-link 192.168.111.140 281
255.255.255.255 255.255.255.255 On-link 127.0.0.1 331
255.255.255.255 255.255.255.255 On-link 192.168.88.100 281
255.255.255.255 255.255.255.255 On-link 192.168.111.140 281
===========================================================================
Persistent Routes:
None